Archive for the ‘hardware’ Category

[koko] MISP 2022

Monday, January 10th, 2022

“Things Have Changed” – Bob Dylan (1999)

“Everything, still remains the same”
“(Sittin’ On) the Dock of the Bay” – Otis Redding (1967)

tl;dr embarking on quantifying meaningful indicators of small computer system performance over the last three decades

In graduate school and subsequent professional work, analyzing performance of computer systems was often my primary effort, including much of the software I wrote, and my first three books. Years ago I pontificated about Meaningful Indicators of System Performance, surveying the (mostly) synthetic benchmarks in vogue in 1990. I was also active in the formation of the Business Applications Performance Corporation. (more…)

[koko] LP digitizing milestone approaching

Tuesday, May 18th, 2021

In my primary collection, I’ve accumulated roughly 800 LPs over the years. Some are junk, some are treasures, a few have never been unsealed, a few are in terrible condition, but mostly these are LPs that I want to hear and preserve. I’d been gradually digitizing them so I could listen to them in the car and on my phone, and so I’d have archival versions if the LPs were lost.

A few years ago, I got a new Audio-Technica turntable to displace my finicky decades-old Thorens (which is now configured for 78s). I did that, in part, to accelerate progress digitizing the LPs and now have maybe 20[1] left before I’ve finished with the primary collection. Now seems the right time to summarize the tools I use and techniques I’ve developed. Both this post and the video are intended to be self-contained, but each probably offers details missing from the other.


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[koko] Dell Unix sustainable!

Tuesday, January 19th, 2021

“The only thing I knew how to do
Was to keep on keepin’ on like a bird that flew”
(1975) “Tangled Up In Blue” – Bob Dylan

tl;dr with 86Box, obsolete hardware not needed

With prodding and help from Antoni Sawicki, and bits of help from others, I’ve been trying to get Dell Unix to be sustainable on modern hardware. I’d succeeded in building our SVR4 from the last sources on turn of the century and older hardware. VMware and VirtualBox options seemed plausible, but so far we haven’t gotten those to have minimally useful networking, only had slow SLIP.

mcom.com on Dell Unix on 86BoxThough it has been around for years, and used by Antoni before, I was unaware of 86Box until late last year when Antoni posted about it, particularly: Dell Unix on 86Box “Today let me present Dell Unix more properly, with 1024×768, 256 colors video and proper networking using emulated VGA and NIC.” That post illustrates Mosaic, FrameMaker et al.

That left the question “What about using Dell SVR4 on 86Box to build SVR4 from the sources?”
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flirted with Big Sur, went back to Catalina

Monday, November 16th, 2020

“The only thing I knew how to do
Was to keep on keepin’ on like a bird that flew”
(1975) “Tangled Up In Blue” – Bob Dylan

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tl;dr Updated 2015 MacBook Pro to Big Sur, regretted, restored Catalina from Time Machine, will probably get M1 MacBook (Air or Pro?) soon

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Apple Event — November 10

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Computer Systems Performance Modeling

Tuesday, August 25th, 2020

“Long ago, far away
Things like that don’t happen
No more, nowadays, do they?”
(1962) “Long Ago, Far Away” – Bob Dylan

Computer Systems Performance Modeling, which Professor K.M. Chandy and I wrote in 1978-9, previously published by Pearson Education, Inc. is now out of print. We are making PDF copies of lightly edited versions available under a Creative Commons license.

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